it's probably the bay area native's last trip to europe as defense secretary. he says he doesn't know why anyone besides people in the military would need armor-piercing bullets. >> for the life of me i could not know why people half to have an assault weapon. for the life of me, i do not know why people- have to have an assault weapon when these kids are getting killed. i know it is tragic. i know what an impact it must have on those families. >> catherine: panetta is defending the president's proposed ban on assault weapons. he says steps can be taken without undermining the second amendment. panetta will probably fly home in time to attend the inauguration. president obama will actually go through the ceremony twice. once on sunday - a private affair. and then monday -- the big public event - complete with crowds and concerts - and tons of security. >> remember the 2009 swearing in? huge crowds. so big - that a lot of people got lost.mis- directed. even stuck in underground walkways - missing the whole ceremony. this year there will be fewer people on the ma